GPS与微波干涉测量在桥梁动挠度测量中的对比分析  

Comparative Analysis of GPS Measurement and Microwave Interference Measurement Applied to Measurement of Bridge Dynamic Deflection

作　　者：刘德煜[1] 

机构地区：[1]中铁大桥局集团武汉桥科院有限公司,湖北武汉430034

出　　处：《桥梁建设》2009年第3期81-84,共4页Bridge Construction

摘　　要：GPS实时动态技术已经在多座大型桥梁的位移测量中得到应用,而微波干涉测量技术近年来也在一些桥梁的挠度测量中得到应用。为评价这两种方法在超大跨度桥梁动挠度测量方面的适用性,在武汉阳逻长江大桥中对比使用了以卡尔曼滤波三差解算法为核心的GPS测量系统与基于微波干涉测量技术的建筑微变远程监测雷达。结果表明,GPS可以满足超大跨度柔性结构桥梁动挠度测量的要求,而建筑微变远程监测雷达由于其一维测量特性更适合于平面位移变化很小的桥梁。The GPS real-time kinematic technique has been applied to the displacement measurement of many major bridges and in the recent years, the microwave interference measurement technique has also found application in the deflection measurement of some of the bridges. To assess the adaptability of the two kinds of the techniques to the measurement of the dynamic deflection of very long span bridges, the GPS measurement system with the triple difference solution of Kalman filtering as the core and the building usage micro-variation remote monitoring radar based on the microwave interference measurement technique were comparatively applied to Wuhan Yangluo Changjiang River Bridge. The results of the comparative application demonstrate that the GPS can satisfy the dynamic deflection measurement of very long span flexible structure bridges while the remote monitoring radar is more suitable for application to the bridges with very small plane displacement variation owing to the characteristic of the one-dimensional measurement of the radar.

关 键 词：长跨桥 悬索桥 动挠度 GPS 微波干涉测量 

分 类 号：U446[建筑科学—桥梁与隧道工程]